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From:   Shuijing Li <shuijing.li@mediatek.com>
To:     <chunkuang.hu@kernel.org>, <p.zabel@pengutronix.de>,
        <airlied@gmail.com>, <daniel@ffwll.ch>, <robh+dt@kernel.org>,
        <krzysztof.kozlowski+dt@linaro.org>, <conor+dt@kernel.org>,
        <matthias.bgg@gmail.com>,
        <angelogioacchino.delregno@collabora.com>, <jitao.shi@mediatek.com>
CC:     <dri-devel@lists.freedesktop.org>,
        <linux-mediatek@lists.infradead.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@mediatek.com>,
        Shuijing Li <shuijing.li@mediatek.com>
Subject: [PATCH v2,2/2] drm/mediatek: dp: Add the audio control to mtk_dp_data struct
Date:   Thu, 6 Jul 2023 10:14:25 +0800
Message-ID: <20230706021425.31735-3-shuijing.li@mediatek.com>
In-Reply-To: <20230706021425.31735-1-shuijing.li@mediatek.com>
References: <20230706021425.31735-1-shuijing.li@mediatek.com>
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Precedence: bulk

Mainly add the following two flag:

1.The audio packet arrangement function is to only arrange audio
packets into the Hblanking area. In order to align with the HW
default setting of g1200, this function needs to be turned off.

2.Due to the difference of HW, different dividers need to be set.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
Changes in v2:
- change the variables' name to be more descriptive
- add a comment that describes the function of mtk_dp_audio_sample_arrange
- reduce indentation by doing the inverse check
- add a definition of some bits
- add support for mediatek, mt8188-edp-tx
per suggestion from the previous thread:
https://lore.kernel.org/lkml/ac0fcec9-a2fe-06cc-c727-189ef7babe9c@collabora.com/
---
 drivers/gpu/drm/mediatek/mtk_dp.c     | 47 ++++++++++++++++++++++++++-
 drivers/gpu/drm/mediatek/mtk_dp_reg.h |  6 ++++
 2 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 64eee77452c0..8e1a13ab2ba2 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -139,6 +139,8 @@ struct mtk_dp_data {
 	unsigned int smc_cmd;
 	const struct mtk_dp_efuse_fmt *efuse_fmt;
 	bool audio_supported;
+	bool audio_pkt_in_hblank_area;
+	u16 audio_m_div2_bit;
 };
 
 static const struct mtk_dp_efuse_fmt mt8195_edp_efuse_fmt[MTK_DP_CAL_MAX] = {
@@ -647,7 +649,7 @@ static void mtk_dp_audio_sdp_asp_set_channels(struct mtk_dp *mtk_dp,
 static void mtk_dp_audio_set_divider(struct mtk_dp *mtk_dp)
 {
 	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC,
-			   AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
+			   mtk_dp->data->audio_m_div2_bit,
 			   AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK);
 }
 
@@ -1362,6 +1364,18 @@ static void mtk_dp_sdp_set_down_cnt_init_in_hblank(struct mtk_dp *mtk_dp)
 			   SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
 }
 
+static void mtk_dp_audio_sample_arrange(struct mtk_dp *mtk_dp)
+{
+	/* arrange audio packets into the Hblanking and Vblanking area */
+	if (!mtk_dp->data->audio_pkt_in_hblank_area)
+		return;
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3374, 0,
+			   SDP_ASP_INSERT_IN_HBLANK_DP_ENC1_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3374, 0,
+			   SDP_DOWN_ASP_CNT_INIT_DP_ENC1_P0_MASK);
+}
+
 static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
 {
 	u32 sram_read_start = min_t(u32, MTK_DP_TBC_BUF_READ_START_ADDR,
@@ -1371,6 +1385,7 @@ static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
 				    MTK_DP_PIX_PER_ADDR);
 	mtk_dp_set_sram_read_start(mtk_dp, sram_read_start);
 	mtk_dp_setup_encoder(mtk_dp);
+	mtk_dp_audio_sample_arrange(mtk_dp);
 	mtk_dp_sdp_set_down_cnt_init_in_hblank(mtk_dp);
 	mtk_dp_sdp_set_down_cnt_init(mtk_dp, sram_read_start);
 }
@@ -2616,11 +2631,31 @@ static int mtk_dp_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend, mtk_dp_resume);
 
+static const struct mtk_dp_data mt8188_edp_data = {
+	.bridge_type = DRM_MODE_CONNECTOR_eDP,
+	.smc_cmd = MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE,
+	.efuse_fmt = mt8195_edp_efuse_fmt,
+	.audio_supported = false,
+	.audio_pkt_in_hblank_area = false,
+	.audio_m_div2_bit = MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
+};
+
+static const struct mtk_dp_data mt8188_dp_data = {
+	.bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
+	.smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
+	.efuse_fmt = mt8195_dp_efuse_fmt,
+	.audio_supported = true,
+	.audio_pkt_in_hblank_area = true,
+	.audio_m_div2_bit = MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
+};
+
 static const struct mtk_dp_data mt8195_edp_data = {
 	.bridge_type = DRM_MODE_CONNECTOR_eDP,
 	.smc_cmd = MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE,
 	.efuse_fmt = mt8195_edp_efuse_fmt,
 	.audio_supported = false,
+	.audio_pkt_in_hblank_area = false,
+	.audio_m_div2_bit = AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
 };
 
 static const struct mtk_dp_data mt8195_dp_data = {
@@ -2628,9 +2663,19 @@ static const struct mtk_dp_data mt8195_dp_data = {
 	.smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
 	.efuse_fmt = mt8195_dp_efuse_fmt,
 	.audio_supported = true,
+	.audio_pkt_in_hblank_area = false,
+	.audio_m_div2_bit = AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
 };
 
 static const struct of_device_id mtk_dp_of_match[] = {
+	{
+		.compatible = "mediatek,mt8188-edp-tx",
+		.data = &mt8188_edp_data,
+	},
+	{
+		.compatible = "mediatek,mt8188-dp-tx",
+		.data = &mt8188_dp_data,
+	},
 	{
 		.compatible = "mediatek,mt8195-edp-tx",
 		.data = &mt8195_edp_data,
diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
index 84e38cef03c2..6d7f0405867e 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp_reg.h
+++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
@@ -162,6 +162,7 @@
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_2	(1 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_4	(2 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_8	(3 << 8)
+#define MT8188_AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2	(4 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2	(5 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_4	(6 << 8)
 #define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_8	(7 << 8)
@@ -228,6 +229,11 @@
 							 VIDEO_STABLE_CNT_THRD_DP_ENC1_P0 | \
 							 SDP_DP13_EN_DP_ENC1_P0 | \
 							 BS2BS_MODE_DP_ENC1_P0)
+
+#define MTK_DP_ENC1_P0_3374			0x3374
+#define SDP_ASP_INSERT_IN_HBLANK_DP_ENC1_P0_MASK	BIT(12)
+#define SDP_DOWN_ASP_CNT_INIT_DP_ENC1_P0_MASK		GENMASK(11, 0)
+
 #define MTK_DP_ENC1_P0_33F4			0x33f4
 #define DP_ENC_DUMMY_RW_1_AUDIO_RST_EN			BIT(0)
 #define DP_ENC_DUMMY_RW_1				BIT(9)
-- 
2.40.1